Mine-hoist.



s. T. NELSON.

MINE HOIST.

APPLICATION FILED APB..16, 1906.

999,841 I Patented Aug. 8, 1911.

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MINE HOIST.

APPLICATION I'ILED APRJB, 1906.

999,841 Patented Aug. 8, 1911.-

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S. T. NELSON.

MINE HOIST.

APPLICATION FILED APR.16, 1906.

Patented Aug. 8, 1911.

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COLUMBIA PLQNODRAPH 20., WASHINGTON, D, c.

S. T. NELSON.

MINE HOIST. APPLICATION nun n11. 16, 1906.

1 999341. Patented Aug. 8,1911.

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COLUMBIA PLANOGRAPH (10.. WASHINGTON. n. c.

UNITE STATE ATE T SVEN T. NELSON, OF CHICAGO, ILLINOIS, ASSIGNOR 'IOSULLIVAN MACHINERY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

MINE-I'IOIST.

Specification of Letters Patent.

Patented Aug. 8, 1911.

Application filed April 16, 1906. Serial No. 311,879.

T 0 all whom it may concern:

Be it known that I, SVEN T. NELSON, a citizen of the United States, andaresident of Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Mine-Hoists, of whichthe following is declared to be a full, clear, and exact description.

The invention relates to hoists for the cars, cages or skips employed inshafts of mines and seeks to provide an improved arrangement of theparts of the hoist, for operating two cars in balance, 73. 6. soconnected that when one car is raised the other is lowered.

The object of the invention is to provide an arrangement of parts inwhich the cable connected to the cars need only be wound a few timesaround the drum of the hoisting engine so that the size and weight ofthe hoisting drum and its driving engine may be considerably less thanthat usually employed. Moreover, with the present improved construction,the length of the cable necessary and the cost of the entireconstruction is considerably reduced.

A further object of the invention is to provide an idler drum inconnection with the drum of the hoisting engine over which drums thecable is passed several times, and to further provide suitable means forcompensating for the differential wear upon the grooves of the drivingand idler drums.

Vith these objects in View the invention consists in the features ofconstruction, combinations and arrangements of parts hereinafter setforth, illustrated in the accompanying drawings and more particularlypointed out in the appended claims.

Figure 1 is a view in side elevation showing the arrangement of parts ofthe improved hoist. Fig. 2 is a plan view thereof. Fig. 3 is a view inend elevation. Fig. 4 is a plan view of the hoisting engine and'drums.Fig. 5 is a view in side elevation thereof. Fig. 6 is a View inelevation of the indicator mechanism. Fig. 7 is a detail view in section of the idler drum. Fig. 8 is a detail plan view of the tool memberfor truing up the grooves of the driving drum, the frame being shown insection and the drum in dotted lines. the tool member with parts shownin section on line 9-9 of Fig. 8. Fig. 10 is a plan view of a modifiedform of tool. Fig. 11 is a cross Fig. 9 is a detail view of section on areduced scale on line 1111 of Fig. 10 and Fig. 12 is a similar crosssection on line 1212 of Fig. 10.

In ordinary practice, when a single drum is employed in a mine hoist foroperating two cars or cages in balance the drum is of such size that acable equal in length to twice the depth of the mine can be woundthereon. In a double drum hoist, with the ordinary practice each drum isof such size to hold a length of cable equal to the depth of the mine.In either case, the length of the cable employed must be equal to twicethe depth of the mine shaft. WVhere the mine shaft is of anyconsiderable depth, this necessitates the use of drums of great size andweight and correspondingly increases the size and cost of the enginesemployed. In accordance with the present invention, the hoisting cableat all times is only wrapped a few times around the drum of the hoistingengine and around an idler drum, so that the size, weight and cost ofthe parts may be considerably reduced and so that the hoist may beoperated at much less expense. Moreover, the length of the hoistingcable need only be slightly greater than the depth are employed and arecoupled by their connecting rods 11 to the cranks 12 on the 0ppositeends of the drum supporting crank shaft 10. An idler drum (Z is mountedupon a shaft 13 journaled in suitable bearings at the forward end of theengine frame a.

The cars, cages or skips e of any suitable construction, are arrangedwithin the mine shaft f and are mounted to slide upon suitable guides orways 14 fixed to the sides of the mine shaft and projecting from theupper end thereof. The upper portions of the frames of the two cars orcages are provided with yokes 15 to which the opposite ends of a singlehoisting cable 9 are respectively connected. The cable 9 passes up fromthe mine shaft over a pair of grooved guide pulleys 16 mounted in anysuitable manner above the upper end thereof. The

or ble passes downwardly from the guide pulley 16 and is reeved severaltimes over the driving and idler drums 7) and (Z in opposite directions,or in the so-called figureeight fashion. The drums are provided withsuitable guide grooves 17 and 18 for the cable, preferably formedbetween ribs 19 and 20 on the respective drums, and the cable is wrappedaround the drums at suiticient number of times to develop the properamount of friction between the cable and the driving drum. By rcevingthe cable in a figure-eight, it engages the driving drum throughout thegreater portion of the periphery thereof so that sufficient friction maybe developed between it and the driving drum with a fewer number ofwraps than with any other method of winding the cable.

The guide pulleys 16 may be supported in. any suitable manner above themine shaft f and are preferably slightly inclined to each other ordiverg d outwardly, as shown in Fig. 2, so as to properly receive andguide the cable as it passes to and from the driving drum 7). The carsor cages are also preferably connected by a second cable 21 Fig. 3) thatfixed at its opposite ends to the lower portions of the frames of thecars or rages and extends downwardly over a grooved guide pulley 22mounted on the shaft 23 at the bottom of the mine shaft.

The engine is provided with any suitable sort of reverse gear so that itmay be driven in opposite directions to alternately lift one of the carsor cages and lower the other. \Vith this arrangement, it will be notedthat the amount of hoisting cable necessary is only a little more thanequals the depth of the mine, so that it may be easily replaced whenvorn out at con'iparatively small cost. Moreover, the driving drum and,in consequence, the operating engines therefor. may be of small size andweight and the cost of equipment and of operation thereby con siderablyreduced as compared with the usual practice. As the engine is driven inopposite directions, the cable first passes on to one of the outergrooves of the drums and such outer grooves will wear more and tend tobecome less in diameter than the central or intermediate grooves- In anordinary construction, in which the cable is wound on the groove of thedrum and remains there until it is unwound, this differential wear ofthe separate grooves is immaterial. But in the present construction, inwhich any section of the cable is wound first upon one of the outergrooves and passes through each of the other grooves until it finallyleaves the drum, such a differential wear will place a very heavy strainupon the cable since, if the outer groove upon which the cable first.passes is smaller in diameter than the others, it will not take up asufiicient length of cable to properly extend around the other grooves.in the present construction, means are provided for conmensating forthis differential strain upon the cable, and for this purpose thegrooves 18 of the idler drum (Z are formed on separate, relativelymovable sections thereof. Preferably, these grooves are formed inseparate rings 24; (see Fig. 7) mounted upon the rim of the drum. Thecentral ring 24- is preferably fixed to or formed in piece with thepulley, while the others are held in place between the central ring andremovable flanges 25 at the outer edges of the rim of the drum. Eachgrooved section or ring therefore of the idler drum (Z and the wraps ofcable therein, are movable relatively to one another and will so move torelieve at once any strain put upon the cable because of the excessivewear of the outer grooves. Such an arrangement of loose, free movablerings would be impracticable for the driving drum, since if only one ofthe rings were fixed, the entire driving strain would have to betransn'iitted through a single wrap or coil of the cable. 111 order thatthe pull of the engine shall be properly transmitted to all of the coilsor wraps of the cable thereon, the flanges 19 or other parts wherein thegrooves Not the driving drum are located, are fixed to or formed in.piece with the rim of the drum and a suitable tool member is providedfor maii'itaining all of the grooves of the same diameter and forpreventing any differential strain on the cable because of the excessivewear of the outer grooves.

The tool member 71' (shown in detail in Figs. 8 and 9) is mounted upon across bar or support 26 extending between the sides of the frame a andarranged between the driving drum 7) and the crossed portions of thecable 9. The tool member 71 is in the form of a flat plate constructedof suitable tool steel and is provided with a series of cutting teeth 27corresponding in shape to the grooves 17 of the drum. The tool memberrests in a recess or guide way 25% formed in the upper surface of thecross ba 26 and is held securely in place by a brace bar 29 extendingover and resting upon the upper surface of the tool member. and boltedat its ends to the cross bar 26 on opposite sides of the recess or guideway 28. By this arrangement the tool member is securely held in aposition parallel to the axis of the driving drum with the cutting teeththereof in line with the grooves of the drum, and so that it may be fedin a direction at right angles to the axis of the drum to bring thecutting teeth into engagement with the grooves at a point just above thecenter of the drum, as shown in F 9.

Suitable means for feeding the tool member comprises a wedge plate 30arranged in the recess or guide way 28 behind the tool member and infront of a ledge or shoulder 31. This wedge is provided with an inclinedface engaging the correspondingly inclined face 32 upon the rear edge ofthe tool member between the side portions 33 thereof. A feed screw 3 1mounted in suitable bearings 35 upon the transverse bar 26, is threadedthrough an upwardly extending lug or abutment 36 upon the wedge 30. Theend of this shaft projects through the engine frame and is provided withsquare ends for receiving a cra-nk handle or other suitable device, bywhich it may be turned to force the tool member against the drum. It isobvious that by means of such a tool the various grooves of the drum maybe turned up from time to time and thus main tained at uniform diameterto avoid any difierential strain upon the cable due to excessive wear'of the outer grooves. 'When the tool member is used to true up thegroove of the driving drum, the latter is preferably not rotated by thesteam engines, but. steam is shut 0H and the drum slowly rotated byloading one of the cages.

The modified form of tool is shown in Figs. 10 and 11, in which a seriesof rotary milling cutters 37 are employed. A slide it similar in shapeto the slide tool member 71 previously described, is mounted in asimilar manner upon the cross bar 26 and beneath a brace bar 29. Thisslide is provided with feeding mechanism similar to that previouslydescribed and is also provided with a pair of forwardly extending arms38, the forward ends of which have suitable bearings 39 for a shaft 40upon which the milling cutters 37 are mounted. These cutters aresuitably shaped to engage the grooves of the driving drum and may be fedforwardly wit-h the slide it to properly engage the same. A worm wheel41 is fixed to one end of the shaft 40 and is arranged to engage a worm42 upon a shaft 43 that is journaled in the supporting cross bar 26below the upper portion thereof. The worm 12 is arranged between a pairof lugs 44: fixed to and depending from the slide it, and through whichlugs the end of the shaft 43 extends. The worm 42 is keyed to rotatewith the shaft 13 but is longitudinally shiftable thereon and moves withthe slide 71-. The opposite end of the shaft 43 is provided with abeveled gear 15 meshing with a gear 46 on the inner end of a shaft 47that is journaled in a lug 48 on the cross bar 26 and in the side of theengine frame a. The outer end of the shaft 17 is provided with a gear 19or with a pulley by which it may be driven from any suitable source ofpower.

An indicator dial 50 is carried upon an upright 51 that is mounted onone side of the engine frame. A pointer 52 is movable over the face ofthe dial for indicating the position of the cars or cages that areoperated by the hoist with reference to the different levels in the mineshaft. This pointer is carried on a shaft 53, journaled on the upper endof the post 51 and is driven by a pair of beveled gears 54 from theupright shaft 55 that extends through the upright or post 51. A pair ofbeveled gears 56 connect the lower end of the shaft 55 with a shortshaft 57 journaled in the side of the engine frame a. A worm wheel 58 onthe outer end of the shaft 57 meshes with the worm 59 upon alongitudinally extending= shaft 60 that is journaled in suitablebearings on the side of the engine frame. The opposite end of the shaft60 is connected by a pair of beveled gears 61 with the shaft 13 of theidler pulley. The idler pulley is keyed to the shaft, and as abovestated, the central ring 24 is fixed to or formed in piece with the sameso that the pulley shaft 13 is rotated to properly move the pointer 52over the indicator dial 50. Such indi-' cator dials are usually drivenfrom the hoisting drum but can be more accurately driven fro-m the idlerdrum of the construction set forth, since the rings of the idler drumare freely and relatively rotatable and there is no tendency for thecable to slip thereon. Any slippage that may occur will be between thecable and the driving drum through which the pull on the cable isapplied.

It is obvious that numerous changes may be made in the details ofconstruction without departure from the essentials of the invention.

Having described my invention, what I claim as new and desire to secureby Letters Patent is 1. In a mine hoist for operating two cars or cagesin balance, the combination with two cars or cages and a reversiblehoisting engine therefor, of a grooved driving drum mounted on theengine shaft, a cooperating grooved idler drum journaled on the engineframe, and a hoisting cable connected at its opposite ends to said carsor cages and reeved several times in opposite directions about saiddriving and idler drums, the grooves of said driving drum being formedin portions fixed thereto and the grooves of said idler drum beingformed in separate relatively movable sections thereof and the centralone of said sections being fixed to the shaft of the idler drum,substantially as described.

2. In a mine hoist for operating two cars or cages in balance, thecombination with two cars or cages and a reversible hoisting enginetherefor, of a grooved driving drum mounted on the engine shaft, acooperating, grooved idler drum o-urnaled on the engine frame, and ahoisting cable connected at its opposite ends to said cars or cages andreeved several times in opposite directions &

about said driving and idler drums, the grooves of said idler drum beingformed in separate, relatively movable rings mounted on its rim, thecentral one of said rings be ing fixed to said drum, substantially asdescribed.

3. In a mine hoist for operating two cars or cages in balance, thecombination with two cars or cages and a reversible hoisting enginetherefor, of a grooved driving drum mounted on the engine shaft, acooperating, grooved idler drum journaled in the engine -frame, and ahoisting cable connected at its opposite ends to said cars or cages andreeved several times in opposite directions about said driving and idlerdrums, said idler drum having flanges removably secured to the oppositeedges of its rim, a fixed central grooved ring formed in piece with itsrim and a series of separate grooved rings mounted on its rims betweensaid central ring and said flanges, substantially as described.

4. In a mine hoist for operating two cars or cages, the combination witha grooved driving drum, of a cooperating, grooved idler drum, a cableconnected to said cars or cages and reeved several times about saiddriving and idler drums, the grooves of said idler drum being formed in.separate, relatively movable sections, and a car indicator driven fromone of said idler drum sections, substantially as described.

5. In a mine hoist for operating two cars or cages, the combination witha grooved driving drum, of a cooperatin grooved idler drum, a cableconnected to said cars or cages and reeved several times about saiddriving and idler drums, the grooves of said idler drum being formed inseparate relatively movable sections thereof, one of which sections isfixed to the shaft of said idler drum, and a car indicator driven fromthe shaft of the idler drum, substantially as described.

(3. In a mine hoist for operating two cars or cages, the combinationwith two cars or cages and a reversible hoisting engine therefor, of agrooved driving drum mounted on the engine shaft, a cooperating groovedidler drum journaled on the engine frame, a hoisting cable connected tosaid cars or cages and reeved several times about said driving and idlerdrums, the grooves of said idler drum being formed in separaterelatively movable rings mounted on the rim, the central ring beingfixed to said drum, and a car indicator driven from the shaft of saiddrum, substantially as described.

7. In a hoist, the combination with a suit able frame, of a driving drumjournaled on said frame, a cooperating idler drum, a cable reevedseveral times around said drums, said driving drum having guide groovesformed in a rim portion fixed thereto, and a tool member mounted on saidframe and having a series of suitably shaped cutters for engaging thegrooves of said driving drum and maintaining them of uniform diameter,substantially as described.

8. In a hoist, the combination with a suitable frame, of a driving drumjournaled on said if 'aine, a cooperating idler drum, a cable reevedseveral times around said drums, each of said drums having guide groovesfor said cable, the guide grooves of said idler drum being formed inseparate, relatively movable sections and the guide grooves of saiddriving drum being formed in a rim portion fixed thereto, and a tool.member mounted on said frame and having a series of suitably shapedcutters for engaging the grooves of said driving drum and maintainingthem of uniform diameter, substantially as described.

9. In a hoist, the combination with a suitable frame, of a driving drumjournaled on said frame, a cooperating idler drum, a cable reevedseveral times around said drums, each of said, drums having guidegrooves for said cable, and a tool member mounted on said frame parallelto the axis of said driving drum and guided to shift at right anglesthereto, said tool member having a series of suitably shaped cutters forengaging the grooves of said driving drum, and means for feeding saidtool member toward said drum, substantially as described.

10. In a mine hoist for operating two cars or cages, the combinationwith two cars or cages and a hoisting engine therefor, of cooperating,grooved driving and idler drums mounted on the engine frame, saiddriving drum being connected to the engine shaft, a hoisting cableconnected to said cars or cages and reeved several times about saiddrums, the grooves of said idler drum being formed in separate,relatively rotatable sections and the grooves of said driving drum beingformed in a rim portion fixed thereto, and a tool member mounted on theengine frame and having a series of suitably shaped cutters for engagingthe grooves of said driving drum and maintaining them of uniformdiameter, substantially as described.

11. In a mine hoist for operating two cars or cages in balance, thecombination with the cars or cages and a hoisting engine therefor, of agrooved driving drum mounted 011 the engine shaft, a cooperating.grooved idler drum journaled on the engine frame, a hoisting cableconnected at its opposite ends to said cars or cages and reeved severaltimes in opposite directions about said driving and idler drums, thegrooves of said idler drum being formed in separate, relatively movablesections thereof and the grooves of said driving drum being formed in arim portion fixed thereto, a drum and maintaining them of uniformditransverse support fixed to the englne frame ameter, substantially asdesorlbed.

between said driving drum and the crossed w T portions of said cable,and a tool member SVEN NELSON 5 adjustably mounted on said support and'Witnesses:

having a series of suitably shaped cutters LILLI AN PRENTIOE,

for engaging the grooves of said driving KATHARINE GERLAOH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

